Wanetta Ayers/Public domain
A humpback whale breaching. We saw this on our trip, too, but didn't get video of it.
My wife, Kelly, and I went whale watching at the Channel Islands for my her birthday and got really close to a pair of humpback whales. Check out the shaky iPhone video: Amid the wind noise, Kelly's amazement and the crowd's perpetual euphoria you can hear the whale's spout!
Fortunately, you can't smell the spray. Awful. Anyway, it was an amazing trip. If you can manage the drive, it's a worth a hike up to Oxnard for the glimpse.